Search results

Therefore, aside from stabilizing in various reaction systems, the ideal organic/metal-organic and inorganic precursor should also possess the controllable and operability structures for the production of new materials with unique properties and structures.
On the other hand, Schiff-base metal complexes also represent another excellent metal-organic candidates to fabricate various functional complexes due to their easily modified structures and various applications in the field of catalysis chemistry, bioinorganic and physical aspects such as mimic of active sites of oxygen evolution center in plants and single-molecule magnets[9-14].
Despite the fact that metal-Schiff-base chemistry and POMs chemistry both have involved in numerous fields of chemistry, but the reports about the combinations of these two interesting fields to generate new hybrid materials has been virtually far unexplored, only a few works incorporating POM and metal-Schiff-base have been report in literature.
The crystal data and structure refinements of compounds 1 in Table 1.
Sheldrick, SHELXL97, Program for Crystal Structure Refinement, University of Göttingen, Göttingen, Germany, 1997; G.

Carbon nanotubes (CNTs) with a diameter of 20±5nm were purchased from Chengdu Institute of Organic Chemistry (C: 97.00 wt%, H: 0.23wt%, O : 2.77wt%).
Since many aromatic ring in their structure, the π-π stacking interaction may play the primary role.
In the case of lignin, since lignin macromolecules have many phenolic and aliphatic hydroxyl groups and aromatic structures, thus the poly(styrene) segments in ABS will have good compatibility with the aromatic structures of lignin through strong van der Waals force or even through “π-π stacking”.
Tang, “Processable hybrids of ferrocene-containing poly(phenylacetylene)s and carbon nanotubes: Fabrication and properties,” Journal of Physical Chemistry B, Vol. 112, no. 30, pp. 8896-8905, July 2008
Sun, “Noncovalent functionalization of carbon nanotubes with sodium lignosulfonate and subsequent quantum dot decoration,” Journal of Physical Chemistry C, Vol. 111, no. 3, pp. 1223-1229, January 2007

School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China 2.
Department of Chemistry, Guangxi Teachers Education University, Nanning 530001, China *Corresponding Author.
Address: School of Chemistry and Chemical Engineering, Guangxi University, 100 Daxue Road, Nanning 530004, P.
In this study, pure Al2O3-2SiO2 powders for a geopolymer were prepared by a sol-gel method, alkali-activation tests and alkali-dissolvability of the powders were carried out, and structure of the powders and alkali-activated products was investigated by 29 Si and 27Al MAS NMR and SEM.
Such a structure was found in the alkali-activated products synthesized with the powders with high 5-coordinated Al contents.

Estimation for the Si-O structures based on the Homology concept Kazuaki Nakane1,a and Istvan Halasz2, b 1Osaka University, 1-7, Yamadaoka, Suita City, Osaka Prefecture, 565-0871, Japan 2PQ Corporation, Research and Development Center, 280 Cedar Grove Road, Conshohocken, PA 19428 (USA) ak-nakane@sahs.med.osaka-u.ac.jp, bistvan.halasz@pqcorp.com Keywords: Homology, image analysis for molecular structure, silica gel Abstract.
It is naturally desirable to understand the underlying molecular chemistry of these methods and utilizing this knowledge for improved control in silica polymerization.
When the structure of an observation area is finer than that of other area the former Betti number b1 is larger than in the later area.
Note that the numerical values of b0 and b1 were independently calculated from each other, thus they independently quantify the [SiO4] connectivity in these amorphous structures.
Analytical Chemistry 2013, 85, 3166

Research on Damage Technology of Variable-Structure Following Warhead Gang Li1, a, Baohui Yuan1,b* , Xingyun Sun1 and Hanhui Liu1 1 Xi’an Modern Chemistry Research Institute, Xi’an, 710065, China anpzk140@163.com Keywords: Damage effect；following warhead；Variable-structure；Parallel form；Series form.
Abstract: Aimed at the structure limitation of tandem following warhead, a variable-structure following warhead which can be transformed from series to parallel was proposed.
The structure of The following warhead are mostly jet-piercing series form.
The difference of new structure and the existing structure was compared in the damage performance.
The structure is shown in figure.1.

Microwave-assisted Parallel Synthesis and Antioxidant Activity of Aryloxy-acetyl Ferrocenes Derivatives Wenbin Wang1, a, Dan Liu1,b, Danwei Pi1,c, Quanbin Liao1,d,* and Mingguo Liu1,e,* 1College of Chemistry and Life Science, China Three Gorges University, Hubei Yichang 443002, P.
The structure-activity relationship analysis showed the electron-donating substituted aryloxyl group could strengthen the radical scavenging abilities, while the electron-withdrawing effects would block antioxidant abilities.
Because of the redox potential of the ferrocene, different ferrocene derivatives have widespread applications in chemistry, biology, and materials.
Microwave assisted organic synthesis is a technique with lots of advantages including short reaction time, high yield and environment friendly [10,11], which can be used to rapidly explore ‘chemistry space’ and increase the diversity of the compounds produced.
The structures for the target compounds were identified by IR, 1H NMR, MS and elemental analysis.

Scanning electron microscopy and energy dispersive spectroscopy were used to study the surface chemistry and microstructure at various stages of the multi-wet-chemical process.
Because it is different between α phase and β phase in the surface chemistry of the alloy [15], it led to the etching reaction on the β phase in the first place.
So the stepping wet-chemical method is conductive to form the highly regular pore structure.
Compared with the dentrites structure, the microporous structure is mainly composed of element Mg, O and Ag, indicating the existence of other oxygenous compounds on the surface besides MgO.
Sample Element Weight% Atomic% Dendritic structure Al 2.85 1.91 Ag 13.08 2.20 O 23.43 26.54 Mg 28.53 21.27 Porous structure Al 13.80 10.19 O 45.52 56.69 Mg 37.20 30.49 Calculation of the contact angles of microstructure surfaces.

ZnO deposited on PSiNs formed a flower-like structure and honeycomb-like network structures.
A crack-like structures was formed in Fig. 1 (a) with no flower structures exited on the surface.
G, "Synthesis and Characterization of Aligned ZnO Nanorods on Porous Aluminum Oxide Template," Journal of Physical Chemistry B, vol. 108, pp. 11976-11980, 2004
Zhang, "Synthesis and characterization of novel flower-shaped ZnO nanostructures," Materials Chemistry and Physics, vol. 105, pp. 194-198, 2007
Tang, "The effects of porous silicon on the crystalline properties of ZnO thin films," Journal of Physics and Chemistry of Solids, vol. 70, pp. 967-971, 2009

Journal of Materials Chemistry A, 2018, 6(10): 4477-4484
Achieving ultrahigh dielectric breakdown strength in MgO-based ceramics by composite structure design [J].
Journal of Materials Chemistry C, 2019, 7(26): 8120-8130
Chemistry of Materials, 2019, 31(3): 979-990
Homogeneous/inhomogeneous-structured dielectrics and their energy-storage performances [J].

Ayupovd Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Acad.
They possess high elasticity which indicates to their polymeric-like structure.
All these results allow better understanding of the possible nature of the films structure and help to clarify the relations of the films physical properties with their composition and structure.
Kosinova, Functional Nanocrystalline Films of Silicon Carbonitride, Chemistry for Sustainable Development. 9 (2001) 31-36
Kosinova, Physical and Chemical Transformations in Thin Films of Silicon Carbonitride during Thermal Annealing, Chemistry for Sustainable Development. 9 (2001) 37–43